Plant repairing method of agricultural land polluted by heavy metal

A phytoremediation and heavy metal technology, applied in the field of phytoremediation, can solve the problems of low biomass, unusable farmland, limited application range, etc., and achieve good results

Inactive Publication Date: 2005-01-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been successful cases of hyperaccumulator plants for the remediation of heavy metal-contaminated soils, the current application range is still very limited
The main problems faced by this technology are: (1) most of the heavy metal hyperaccumulator plants that have been found so far have very low biomass and are difficult to be directly applied; (2) the use of biotechnology to transform hyperaccumulator plants to improve their biological The research on creating new high-biomass plants with high heavy metal accumulation capacity has just begun, and it will tak

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: utilize corn to carry out phytoremediation of Pb polluted agricultural land

[0016] In another agricultural test site, the soil Pb concentration is 400mg / kg, and the soil contains about 6000mg / m of Pb 2 , belonging to moderate Pb pollution. Now utilize corn to carry out phytoremediation while not affecting agricultural land utilization with the inventive method:

[0017] 1. Variety collection: Extensive collection of local commonly used corn and tomato varieties, a total of 25 corn varieties and 15 tomato varieties were collected;

[0018] 2. Variety screening: Cultivate the collected corn and tomato varieties in soil with a Pb content of 590 mg / kg by potting method, collect seeds, roots, stems and leaves of each variety after fruiting, and analyze each sample using the national standard method Pb content, it was found that Maize Chaotian 711 met the screening target, that is, the Pb content in its seeds was very low, but the Cd content in its roots, st...

Embodiment 2

[0023] Embodiment 2: Utilize corn to carry out phytoremediation to Cd polluted agricultural land

[0024] Cd is a non-life essential element and one of the most toxic heavy metal elements in nature. An agricultural test site located in the suburbs of Qingyuan City, Guangdong Province, the soil Cd concentration is 10mg / kg, and the soil contains about 1500mg / m3 of Cd 2 , belonging to moderate Cd pollution. Now utilize corn to carry out phytoremediation while not affecting agricultural land utilization with the inventive method:

[0025] 1. Variety collection: Extensive collection of local commonly used corn and tomato varieties, a total of 25 corn varieties and 15 tomato varieties were collected;

[0026] 2. Variety screening: Cultivate the collected corn and tomato varieties in the soil with a Cd content of 16.5 mg / kg by potting method. After fruiting, collect the samples of seeds, roots, stems and leaves of each variety, and use the national standard method to analyze each v...

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PUM

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Abstract

A plant method for restoring the agicultural field polluted by heavy metals includes such steps as screening the agricultural crops which features that their roots can absorb heavy metals but their seeds contains less heavy metals, and planting them in said polluted field.

Description

technical field [0001] The invention belongs to the technical fields of agriculture and environmental protection. It specifically relates to a method for phytoremediation of agricultural land polluted by medium and low heavy metals. Background technique [0002] In view of the seriousness and urgency of soil heavy metal pollution, countries all over the world have paid great attention to the prevention and control of heavy metal pollution, and have explored a variety of treatment technologies, mainly soil solidification, vitrification, leaching, soil washing, guest Indigenous method and electrochemical method, etc. However, traditional heavy metal pollution control technologies are expensive and difficult to use on a large scale. Finding a cheap, permanent and effective treatment method that can maintain soil fertility has always been a difficult and hot topic in international research. In 1977, Brooks proposed the concept of hyperaccumulator. In 1983, Chaney proposed the...

Claims

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Application Information

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IPC IPC(8): B09C1/10
Inventor 杨中艺袁剑刚代全林朱芳朱云梁晓华辛国荣席嘉宾张振霞
Owner SUN YAT SEN UNIV
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